16603661356 has 12 divisors (see below), whose sum is σ = 29058751960. Its totient is φ = 8301160800.

The previous prime is 16603661297. The next prime is 16603661369. The reversal of 16603661356 is 65316630661.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109470 + ... + 212581.

Almost surely, 2^16603661356 is an apocalyptic number.

It is an amenable number.

16603661356 is a deficient number, since it is larger than the sum of its proper divisors (12455090604).

16603661356 is a wasteful number, since it uses less digits than its factorization.

16603661356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334944 (or 334942 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 43.

The spelling of 16603661356 in words is "sixteen billion, six hundred three million, six hundred sixty-one thousand, three hundred fifty-six".